Safety knife



FIG. 1 is a perspective view of a safety knife in accordance with an embodiment of the present invention;

FIG. 2 is a front view of the safety knife of FIG. 1;

FIG. 3 is a back view of the safety knife of FIG. 1; and,

FIG. 4 is a reverse perspective view of the safety knife of FIG. 1. 

CLAIM The ornamental design for a safety knife, as shown. 